Document Detail

Multivariate spatial-temporal modeling and prediction of speciated fine particles.
MedLine Citation:
PMID:  20407598     Owner:  NLM     Status:  Publisher    
Fine particulate matter (PM(2.5)) is an atmospheric pollutant that has been linked to serious health problems, including mortality. PM(2.5) is a mixture of pollutants, and it has five main components: sulfate, nitrate, total carbonaceous mass, ammonium, and crustal material. These components have complex spatial-temporal dependency and cross dependency structures. It is important to gain insight and better understanding about the spatial-temporal distribution of each component of the total PM(2.5) mass, and also to estimate how the composition of PM(2.5) might change with space and time, by spatially interpolating speciated PM(2.5). This type of analysis is needed to conduct spatial-temporal epidemiological studies of the association of these pollutants and adverse health effect.We introduce a multivariate spatial-temporal model for speciated PM(2.5). We propose a Bayesian hierarchical framework with spatiotemporally varying coefficients. In addition, a linear model of coregionalization is developed to account for spatial and temporal dependency structures for each component as well as the associations among the components. We also introduce a statistical framework to combine different sources of data, which accounts for bias and measurement error. We apply our framework to speciated PM(2.5) data in the United States for the year 2004. Our study shows that sulfate concentrations are the highest during the summer while nitrate concentrations are the highest during the winter. The results also show total carbonaceous mass.
Jungsoon Choi; Montserrat Fuentes; Brian J Reich; Jerry M Davis
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Publication Detail:
Journal Detail:
Title:  Journal of statistical theory and practice     Volume:  3     ISSN:  1559-8616     ISO Abbreviation:  -     Publication Date:  2009 Jun 
Date Detail:
Created Date:  2010-7-13     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101513487     Medline TA:  J Stat Theory Pract     Country:  -    
Other Details:
Languages:  ENG     Pagination:  407-418     Citation Subset:  -    
J. Choi is a Graduate Student at the Department of Statistics, North Carolina State University. M. Fuentes is a Associate Professor at the Department of Statistics, North Carolina State University. (Email: ). B. J. Reich is a Postdoctoral Fellow at the Department of Statistics, North Carolina State University. J. M. Davis is a Professor in the Department of Marine Earth and Atmospheric Sciences, North Carolina State University. concentrations are high during the summer and fall seasons.
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Grant Support
R01 ES014843-01A2//NIEHS NIH HHS; R01 ES014843-02//NIEHS NIH HHS

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